Cost-saving System Management Reference Design for Lithium Pedelec/E-bike Batteries

摘要

Ams's example design for lithium pedelec/e-bike batteries implements accurate cell monitoring and balancing without the need for a microcontroller in the Battery Management System (BMS). Battery pack and pedelec manufacturers which use the design will benefit from valuable bill-of-materials (BoM) cost savings and a simpler circuit design, compared to batteries in production today. The ams design is for a 48-V pedelec battery consisting of up to 14 lithium-ion cells. It uses two AS8506 smart cell monitoring ICs, with few supporting components, to monitor the temperature and voltage of up to seven cells each and to implement passive balancing of the cells when charging.